Designed specifically for Fluval 307/407 and 306/406 performance canister filters, Phosphate Resin infused Pads perform double duty as both an effective mechanical and chemical media. Fluval Phosphate Remover is effective at removing and controlling phosphate, and trapping floating particles for clear water (debris, excess food and waste). For best results, replace monthly or as required after testing water. For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world?s first 3-stage filter with synchronous motor technology - a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval?s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.